I COMPLETE THE FOLLOWING TABLE
MIXTURE
REASON
METHODE OF SEPERATION
WATER AND ACETONE
AMMONIUM
CHLORIDE + SULPHUR
POWDER
KEROSENE + OIL
PETROL+DIESEL
CHEMICAL PRECIPITATE
Answers
Answer:
Which separation techniques will you apply for the separation of the following? (1) Sodium chloride from its solution in water. (2) Ammonium chloride from a mixture containing sodium chloride and ammonium chloride. (3) Small pieces of metal in the engine oil of a car. (4) Different pigments from an extract of flower petals. (5) Butter from curd. (6) Oil from water. (7) Tea leaves from tea.(8) Iron pins from sand. (9) Wheat grains from husk. (10) Fine mud particles suspended in water
Answer:
The substances that we see are not in their pure form. They are typically a mixture of two substances or more. Surprisingly, mixtures appear to come in different ways too. Consequently, there are many types of separation methods used to isolate a mixture of substances.
(1) The evaporation method will isolate the sodium chloride from its solution in water. During the process, water evaporates leaving behind the sodium chloride in the container.
(2) By sublimation process, ammonium chloride can be obtained as sublime from the mixture which contains sodium chloride and ammonium chloride.
(3) Small pieces of metal in the engine oil of a car may be separated by the filtration process using an appropriate filter.
(4) Using chromatography technique different pigments from an extract of flower petals.
(5) Butter can be isolated from curd by the centrifugation method.
(6) The mixture of oil and water can be separated by using separating funnel technique. The mechanism involves taking advantage of the unequal density of the particles in the mixture. In the mixture of oil and water, water density is more than oil, hence water is separated first from the separating funnel leaving behind the oil.
(7) Tea leaves can be isolated from tea by the filtration method. Various filtering agents such as filter paper and other material are used to proceed with the filtration process.
(8) Iron pins can be separated from the sand by a magnetic separation method. Since iron has a strong magnetic property it can be isolated using strong magnets.
(9) Wheat grains from husk can be done through the Winnowing technique or sedimentation process. This process takes some amount of time.
(10) Fine particles of mud suspended in water can be separated by the process of sedimentation followed by the filtration method. Sedimentation is a process by which heavier impurities present in mixture settle down at the bottom of the container and it can be separated by the filtration method. Centrifugation process can also be used.
Explanation:
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Answer:
Separating the Components of a Mixture
We have learnt that most of the natural substances are not chemically pure. Different methods of separation are used to get individual components from a mixture. Separation makes it possible to study and use the individual components of a mixture.
Heterogeneous mixtures can be separated into their respective constituents by simple physical methods like handpicking, sieving, filtration that we use in our day-to-day life. Sometimes special techniques have to be used for the separation of the components of a mixture.
How can we separate a solvent from its solute?
Activity 1 : How can we obtain coloured compound (dye) from blue/black ink?
Fill half a beaker with water.
Put a watch glass on the mouth of the beaker
Put few drops of ink on the watch glass.
Now start heating the beaker. We do not want to heat the ink directly. You will see that evaporation is taking place from the watch glass.
Continue heating as the evaporation goes on and stop heating when you do not see any further change on the watch glass.
Observe carefully and record your observations.

are very small and pass through a filter paper. For such particles the filtration technique cannot be used for separation. Such mixtures are separated by centrifugation.
The principle is that the denser particles are forced to the bottom and the lighter particles stay at the top when spun rapidly.
Applications
Used in diagnostic laboratories for blood and urine tests.
Used in dairies and home to separate butter from cream.
Used in washing machines to squeeze out water from wet clothes.